trying to reproduce spring-projects/spring-framework#32730

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.3.0</version>
+    </parent>
+    <groupId>com.example</groupId>
+    <artifactId>spring-framework-32730</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-framework-32730</name>
+    <description>spring-framework-32730</description>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jersey</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.micrometer</groupId>
+            <artifactId>micrometer-core</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.2.5</version>
+                <configuration>
+                    <argLine>-Xmx23m -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=${project.build.testOutputDirectory}/dump.hprof -XX:+ExitOnOutOfMemoryError</argLine>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/main/java/com/example/springframework32730/SpringFramework32730Application.java

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+package com.example.springframework32730;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringFramework32730Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringFramework32730Application.class, args);
+    }
+
+}

src/main/java/com/example/springframework32730/TestApplication.java

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+package com.example.springframework32730;
+
+import jakarta.annotation.PostConstruct;
+import jakarta.ws.rs.ApplicationPath;
+import org.glassfish.jersey.server.ResourceConfig;
+import org.springframework.stereotype.Component;
+
+@ApplicationPath("/")
+@Component
+public class TestApplication extends ResourceConfig {
+    @PostConstruct
+    void register() {
+        register(TestResource.class);
+    }
+}

src/main/java/com/example/springframework32730/TestResource.java

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+package com.example.springframework32730;
+
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.QueryParam;
+import jakarta.ws.rs.WebApplicationException;
+import jakarta.ws.rs.container.AsyncResponse;
+import jakarta.ws.rs.container.Suspended;
+import jakarta.ws.rs.core.Response;
+
+@Path("/test")
+public class TestResource {
+    @GET
+    public void get(@Suspended AsyncResponse response, @QueryParam("async") Boolean async, @QueryParam("error") Boolean error) {
+        if (Boolean.TRUE.equals(async)) {
+            new Thread(() -> reply(response, error)).start();
+        } else {
+            reply(response, error);
+        }
+    }
+
+    private void reply(AsyncResponse response, Boolean error) {
+        if (Boolean.TRUE.equals(error)) {
+            response.resume(new WebApplicationException(417));
+        } else {
+            response.resume(Response.ok("success").build());
+        }
+    }
+}

src/main/resources/application.properties

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+server.port=8999
+management.server.port=8998
+spring.application.name=spring-framework-32730
+management.endpoint.metrics.enabled=true
+management.endpoints.web.exposure.include=metrics

src/test/java/com/example/springframework32730/SpringFramework32730ApplicationTests.java

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+package com.example.springframework32730;
+
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.ResponseEntity;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+class SpringFramework32730ApplicationTests {
+    private static final Logger LOG = getLogger(SpringFramework32730ApplicationTests.class);
+
+    @Autowired
+    private TestRestTemplate template;
+
+    @Test
+    void testGet() {
+        int i = 0;
+        while (!Thread.interrupted()) {
+            final ResponseEntity<String> response = template.getForEntity("/test", String.class);
+            if (i % 1000 == 0) {
+                LOG.info("response={}", response);
+            }
+            i++;
+        }
+    }
+}
+